Calcium forms ions with a charge of +2. iodine forms ions with a charge of -1. which of the following would represent an ionic compound composed of calcium and iodide ions? options: cai2 cai ca2i ca2i 2cai cai2

Answer : The correct option is .

Explanation :

Ionic compound : It consist of a metal and non-metal. It is made up of ions that  gains or lose electrons and giving them a net positive and negative charge.

Metals have tendency to lose electrons easily, so they become cation which have a positive charge and non-metal have tendency to gain electrons, so they become anion which have a negative charge.

As we know that the Calcium forms ions with a charge of (+2) and Iodine forms ions with a charge of (-1).

Two iodide ion will require to combine with one calcium ion for a neutral compound.

Therefore, the correct representation of an ionic compound of Calcium and Iodide ions is .

The image is shown below.

answer; i believe that the correct answer is (a); a large rock being weathered by wind and rain;

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-